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A crested bird (Opisthocomus hoazin) of tropical South America having brown and buff plumage and a blue face. Juveniles have claws on the first and second digits of the wings.

[American Spanish hoazín, from Nahuatl uatzin, pheasant or small game bird.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(həʊˈætsɪn) or


(Animals) a unique South American gallinaceous bird, Opisthocomus hoazin, with a brownish plumage, a very small crested head, and clawed wing digits in the young: family Opisthocomidae
[C17: from American Spanish, from Nahuatl uatzin pheasant]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(hoʊˈæt sɪn, ˈwɑt sɪn)

a slender, crested gallinaceous bird, Opisthocomus hoatzin, of the Amazon and Orinoco basins, with young having a temporary claw on the wing for grasping branches.
[1655–65; « Nahuatl huāctzīn,huāhtzīn name for several henlike birds of the Valley of Mexico]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.hoatzin - crested ill-smelling South American bird whose young have claws on the first and second digits of the wingshoatzin - crested ill-smelling South American bird whose young have claws on the first and second digits of the wings
gallinacean, gallinaceous bird - heavy-bodied largely ground-feeding domestic or game birds
genus Opisthocomus, Opisthocomus - type genus of the Opisthocomidae: hoatzins
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
They are the Hoatzin, known as the missing link between reptiles and birds, and surely look like they've crossed the time line between the prehistoric era and the present day.
"Most provocatively,  Anchiornis  is presented in this artwork climbing in the manner of hoatzin chicks, the only living bird whose juveniles retain a relic of their dinosaurian past, a functional claw," said Evan Saitta in a (http://www.bris.ac.uk/news/2017/november/feathered-dinosaurs.html) news release on University of Bristol website.
Hoatzin are the only living representatives of one of the most ancient lineages of birds, with origins about 64,000,000 years ago.
One animal they were eager to see was the hoatzin, which is a "punk-rock looking bird," he said, because of its mohawk.
2004: Exposure to ecotourism reduces survival and affects stress response in hoatzin chicks (Opisthocomus hoazin).
The researchers report that world's top 50 most evolutionarily distinct bird species include widely distributed and common species such as the osprey and the ostrich, well-known oddities such as the hoatzin and the shoebill, and lesser-known, range-restricted species such as the New Caledonian owlet-nightjar and the Solomon Islands frogmouth, the researchers report.
some of these include the emerald tree boa, the silky anteater, the golden cock-of-the-rock, the golden lion tamarin, and the hoatzin. These are in addition to the featured animals which include the jaguar, tapir, giant armadillo, toucans (they like to be in pairs), the sloth, an anaconda, howler monkeys and poisonous tree frogs.
Among other major errors, Heaton stated that archaeopteryx is just "a bird with teeth" like the modern quetzal and hoatzin. However, neither bird has any teeth.